I like games that use the Unity engine, and I like musical games that are also random soundtrack generators, but I usually don't like physics puzzlers. So I suppose that Drop, a musical physics puzzler in Unity from Quick Fingers, gets two out of three! Actually, Drop is a great example of how an often mediocre genre can be original and fun with just the right presentation. Drop doesn't have an elaborate backstory or hamfisted theme, but instead relies on cool, clean visuals and some clever sound design for a game that's often quite fun to play.
Sandbox mode gives you a free screen to draw on and play with, while the actual gameplay is found in Puzzle mode. The goal of Drop's Puzzle mode is to fill all the end pipes with bouncy white projectiles. These projectiles appear from one or more other pipes throughout the level, and you can maneuver projectiles around obstacles and to their goal by drawing lines across the screen, off of which they will readily ricochet. Draw a line by clicking and dragging with the left mouse button, and delete it by clicking on it with the right button. Certain colors indicate that obstacles will behave in certain ways; white acts pretty much like a line you draw, red destroys projectiles, blue is super-elastic, etc. You can only draw a certain number of lines each level, so the challenge is in shuttling the projectiles around obstacles as efficiently as you can.
While many Unity games make use of its 3D capabilities, Drop doesn't have a 3D appearance, and instead uses Unity to manage the game's physics. The look that results is simple, colorful, and "computer-y" in a Tron sort of way that looks great. The sound design is perhaps Drop's most unique feature: Every time a projectile bounces off a non-red surface, it plays a random pitch that fits a given key. In Sandbox mode, you can create elaborate physical soundtrack machines in this way, and for levels with many lines and obstacles, the result is a bloopy, carnival soundtrack that makes even the most tricky levels fun to listen to. Levels in Drop range from fairly easy to pretty challenging, and the hardest levels require a great deal of finesse and attention. Thankfully due to a recent update to the game, you can now move and edit endpoints thus making fine tuning of your designs a breeze.
Overall, Drop contains smart level design, fun effects, and spiffy presentation. Drop is a fine physics-puzzle game that shows a little clever attention to detail can liven up an otherwise ordinary game.